Malicious PDF — malware analysis report

Static analysis result for SHA-256 991e9ed3857d08c2…

MALICIOUS

PDF

97.4 KB Created: 2021-03-18 13:26:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3087feb4d34b226f8d057114f451831f SHA-1: 7e9242283ebd24da6c80bcf381f8c94cdd251924 SHA-256: 991e9ed3857d08c202a20f2098df976e88b5b72231621dd91c153d591aff3cde
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV. It employs lures such as fake invoices and payment notifications, and contains numerous embedded URLs pointing to disposable hosting, suggesting a phishing or scam attempt. The presence of free webmail in remittance details further supports this. No scripts were extracted, but the document's structure and embedded URIs indicate a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Invoice remittance address uses free webmail high SE_INVOICE_FREE_WEBMAIL_REMITTANCE
    Document contains invoice and bank-transfer/payment context, but the remittance or payment contact address uses a consumer webmail domain. This is a strong business-email-compromise indicator.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://seumenha.ru/wix?keyword=zmodo+zp-ibi13-w+price PDF link annotation
    • https://cdn.sqhk.co/lediname/YnNjgXq/zejejunepokomunekulamado.pdfIn PDF document text
    • https://cdn.sqhk.co/torujazelome/uJ4xidu/opera_ve_balet_teatri_afisha_oktyabr_2019.pdfIn PDF document text
    • http://gilumesu.mypressonline.com/what_is_critical_theory_in_english_literature.pdfIn PDF document text
    • http://lubenoredeji.mypressonline.com/how_to_boost_the_left_side_of_your_brain.pdfIn PDF document text
    • https://cdn.sqhk.co/kapopajij/2kWhgtD/bejekefe.pdfIn PDF document text
    • https://cdn.sqhk.co/vudararemane/z3jfghg/yalghaar_delta_igi_commando_adventure_mobile_game_mod.pdfIn PDF document text
    • http://mixezitubut.mygamesonline.org/netters_orthopedic_anatomy_anki.pdfIn PDF document text
    • https://cdn.sqhk.co/puzadowoke/jcjfijy/somijediwoji.pdfIn PDF document text
    • https://cdn.sqhk.co/vivijuzajus/b5Wjbih/buxerarolot.pdfIn PDF document text
    • http://linefofaxugedu.mywebcommunity.org/10904365022.pdfIn PDF document text
    • https://cdn.sqhk.co/lesasafo/hxAH3ia/87325224679.pdfIn PDF document text
    • http://kuxuvajivor.iblogger.org/english_to_german_dictionary_free.pdfIn PDF document text
    • https://cdn.sqhk.co/gevolonovare/i3XKK0J/fire_and_water_3_game_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zelumevimitu/X77BJgm/arena_gorda_beach_punta_cana_dominican_republic.pdfIn PDF document text
    • http://vavesojijakoju.iblogger.org/best_reading_comprehension_books_for_4th_grade.pdfIn PDF document text
    • https://cdn.sqhk.co/pefatipi/1IjgCWA/78861905466.pdfIn PDF document text
    • https://cdn.sqhk.co/romilononove/igjb1hj/bepukewugi.pdfIn PDF document text
    • https://cdn.sqhk.co/kotoweraga/lJjhIVw/complete_digestive_enzymes_walmart.pdfIn PDF document text
    • https://cdn.sqhk.co/gevajoke/Ed6ghV2/33418861740.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxujagemo/eIRAjhc/nupopubawimaworapikawu.pdfIn PDF document text
    • https://cdn.sqhk.co/migefareg/0iahbhc/xutubejokixonoses.pdfIn PDF document text
    • http://faripofijukevom.mywebcommunity.org/sony_usb_turntable_software.pdfIn PDF document text
    • http:///control/faststream.jpg?stream=MxPEG&needlength&fps=6OtherIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lavuradisaxel.epizy.com/tabela_municipios_ibge_2016.pdfIn PDF document text
    • http://vabagez.rf.gd/zajoto.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11999 2900 bytes
SHA-256: 5226c763f3d4f3cbceb38bcb13217c6b3d4a8982263ccab1e51df51dbcfe70e9
font_01_sfnt_off000123ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123EE 5284 bytes
SHA-256: 2d68dd920babe1f69fd604ccafb294106edeabdabe2343c2039b5617b2416feb
font_02_sfnt_off000135f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135F8 12512 bytes
SHA-256: 131ccc0cffca5c858a460a540bb6ce1ac892e67cafe6932f9666fb17e9bf2e2c
font_03_sfnt_off00016026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16026 16364 bytes
SHA-256: 4f5fe7cec457e80e806230e9cb839bc5987c8924ff7362057e91fa7dc855f0bf